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-rw-r--r--polarssl/src/library/entropy.c204
1 files changed, 0 insertions, 204 deletions
diff --git a/polarssl/src/library/entropy.c b/polarssl/src/library/entropy.c
deleted file mode 100644
index 9662454..0000000
--- a/polarssl/src/library/entropy.c
+++ /dev/null
@@ -1,204 +0,0 @@
-/*
- * Entropy accumulator implementation
- *
- * Copyright (C) 2006-2011, Brainspark B.V.
- *
- * This file is part of PolarSSL (http://www.polarssl.org)
- * Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
- *
- * All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include "polarssl/config.h"
-
-#if defined(POLARSSL_ENTROPY_C)
-
-#include "polarssl/entropy.h"
-#include "polarssl/entropy_poll.h"
-
-#if defined(POLARSSL_HAVEGE_C)
-#include "polarssl/havege.h"
-#endif
-
-#define ENTROPY_MAX_LOOP 256 /**< Maximum amount to loop before error */
-
-void entropy_init( entropy_context *ctx )
-{
- memset( ctx, 0, sizeof(entropy_context) );
-
- sha4_starts( &ctx->accumulator, 0 );
-#if defined(POLARSSL_HAVEGE_C)
- havege_init( &ctx->havege_data );
-#endif
-
-#if !defined(POLARSSL_NO_DEFAULT_ENTROPY_SOURCES)
-#if !defined(POLARSSL_NO_PLATFORM_ENTROPY)
- entropy_add_source( ctx, platform_entropy_poll, NULL,
- ENTROPY_MIN_PLATFORM );
-#endif
-#if defined(POLARSSL_TIMING_C)
- entropy_add_source( ctx, hardclock_poll, NULL, ENTROPY_MIN_HARDCLOCK );
-#endif
-#if defined(POLARSSL_HAVEGE_C)
- entropy_add_source( ctx, havege_poll, &ctx->havege_data,
- ENTROPY_MIN_HAVEGE );
-#endif
-#endif /* POLARSSL_NO_DEFAULT_ENTROPY_SOURCES */
-}
-
-int entropy_add_source( entropy_context *ctx,
- f_source_ptr f_source, void *p_source,
- size_t threshold )
-{
- int index = ctx->source_count;
-
- if( index >= ENTROPY_MAX_SOURCES )
- return( POLARSSL_ERR_ENTROPY_MAX_SOURCES );
-
- ctx->source[index].f_source = f_source;
- ctx->source[index].p_source = p_source;
- ctx->source[index].threshold = threshold;
-
- ctx->source_count++;
-
- return( 0 );
-}
-
-/*
- * Entropy accumulator update
- */
-int entropy_update( entropy_context *ctx, unsigned char source_id,
- const unsigned char *data, size_t len )
-{
- unsigned char header[2];
- unsigned char tmp[ENTROPY_BLOCK_SIZE];
- size_t use_len = len;
- const unsigned char *p = data;
-
- if( use_len > ENTROPY_BLOCK_SIZE )
- {
- sha4( data, len, tmp, 0 );
-
- p = tmp;
- use_len = ENTROPY_BLOCK_SIZE;
- }
-
- header[0] = source_id;
- header[1] = use_len & 0xFF;
-
- sha4_update( &ctx->accumulator, header, 2 );
- sha4_update( &ctx->accumulator, p, use_len );
-
- return( 0 );
-}
-
-int entropy_update_manual( entropy_context *ctx,
- const unsigned char *data, size_t len )
-{
- return entropy_update( ctx, ENTROPY_SOURCE_MANUAL, data, len );
-}
-
-/*
- * Run through the different sources to add entropy to our accumulator
- */
-int entropy_gather( entropy_context *ctx )
-{
- int ret, i;
- unsigned char buf[ENTROPY_MAX_GATHER];
- size_t olen;
-
- if( ctx->source_count == 0 )
- return( POLARSSL_ERR_ENTROPY_NO_SOURCES_DEFINED );
-
- /*
- * Run through our entropy sources
- */
- for( i = 0; i < ctx->source_count; i++ )
- {
- olen = 0;
- if ( ( ret = ctx->source[i].f_source( ctx->source[i].p_source,
- buf, ENTROPY_MAX_GATHER, &olen ) ) != 0 )
- {
- return( ret );
- }
-
- /*
- * Add if we actually gathered something
- */
- if( olen > 0 )
- {
- entropy_update( ctx, (unsigned char) i, buf, olen );
- ctx->source[i].size += olen;
- }
- }
-
- return( 0 );
-}
-
-int entropy_func( void *data, unsigned char *output, size_t len )
-{
- int ret, count = 0, i, reached;
- entropy_context *ctx = (entropy_context *) data;
- unsigned char buf[ENTROPY_BLOCK_SIZE];
-
- if( len > ENTROPY_BLOCK_SIZE )
- return( POLARSSL_ERR_ENTROPY_SOURCE_FAILED );
-
- /*
- * Always gather extra entropy before a call
- */
- do
- {
- if( count++ > ENTROPY_MAX_LOOP )
- return( POLARSSL_ERR_ENTROPY_SOURCE_FAILED );
-
- if( ( ret = entropy_gather( ctx ) ) != 0 )
- return( ret );
-
- reached = 0;
-
- for( i = 0; i < ctx->source_count; i++ )
- if( ctx->source[i].size >= ctx->source[i].threshold )
- reached++;
- }
- while( reached != ctx->source_count );
-
- memset( buf, 0, ENTROPY_BLOCK_SIZE );
-
- sha4_finish( &ctx->accumulator, buf );
-
- /*
- * Perform second SHA-512 on entropy
- */
- sha4( buf, ENTROPY_BLOCK_SIZE, buf, 0 );
-
- /*
- * Reset accumulator and counters and recycle existing entropy
- */
- memset( &ctx->accumulator, 0, sizeof( sha4_context ) );
- sha4_starts( &ctx->accumulator, 0 );
- sha4_update( &ctx->accumulator, buf, ENTROPY_BLOCK_SIZE );
-
- for( i = 0; i < ctx->source_count; i++ )
- ctx->source[i].size = 0;
-
- memcpy( output, buf, len );
-
- return( 0 );
-}
-
-#endif